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为了减少汞害和提高分析方法的灵敏度,近年来对不同类型汞膜电极的制作、性能和应用进行了研究。如灵敏度很高的玻碳电极、渗蜡电极、铂球镀银—汞膜电极、悬汞电极、银丝银球汞膜电极、金银醮汞电极和铂体汞膜电极等。我们试制了铂丝—银球—汞膜电极。实践证明,选择合适的底液,对测定镉它是完全可以代替滴汞电极的,这就减少了汞的用量,提高了灵敏度。如与示波极谱法结合使用,可使测定的上限和下限扩大,0.01—100ppm范围内成线性关系,且操作简
In order to reduce mercury damage and increase the sensitivity of analytical methods, the fabrication, properties and applications of different types of mercury film electrodes have been studied in recent years. Such as high sensitivity glassy carbon electrode, infiltrated electrode, platinum silver ball - mercury membrane electrode, hanging mercury electrode, silver silver mercury ball electrode, silver mercury mercury electrode and platinum body mercury electrode. We tried a platinum wire - silver ball - mercury film electrode. Practice has proved that the choice of the appropriate base solution, the determination of cadmium it can replace the drop of mercury electrode, which reduces the amount of mercury, increased sensitivity. As used in combination with oscillopolarography, the upper and lower limits of the assay can be extended, with a linear relationship in the 0.01-100 ppm range,